BIOL 1113 Midterm: Study Guide General Biology 2 Exam 1
Document Summary
Concepts and terms, you should review for your first exam + practice questions with answers + video and readings summery. Over time, organisms become modified by the process of natural selection: all living organisms descended from a common ancestor. Origin and history of life: 13-17 bya big bang formed, 4-3. 5 bya life emerged. Overlapping stages: nucleotides and amino acids produced prior to existence of cells, nucleotides and amino acids become polymerized to form dna rna protein, polymers become enclosed in membranes, polymers enclosed in membranes evolved cellular properties. Primitive earth: reducing atmosphere hypothesis, oparin/haldane hypothesis ; abiotic synthesis. First biomolecules: miller/urey"s experiments results ; biochemicals could be produces from simple nonbiological sources, extra-terrestrial hypothesis, organic carbon from asteroids and comets locked pre biotic soot, deep-sea vent hypothesis, key organics arose at deep sea vents. Dating of fossils: relative (index species), absolute radioisotopes, half-life, calculation.